SLVUD44A March   2025  – October 2025 TPS1689

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 General Configurations
      1. 2.1.1 Physical Access
      2. 2.1.2 Test Equipment and Setup
        1. 2.1.2.1 Power supplies
        2. 2.1.2.2 Meters
        3. 2.1.2.3 Oscilloscope
        4. 2.1.2.4 USB-to-GPIO Interface Adapter
        5. 2.1.2.5 Loads
  8. 3Implementation Results
    1. 3.1 Test Setup and Procedures
      1. 3.1.1 Hot Plug
      2. 3.1.2 Start-up With Enable
      3. 3.1.3 Power Up Into Short
      4. 3.1.4 Undervoltage Lockout
      5. 3.1.5 Overvoltage Lockout
      6. 3.1.6 Overcurrent Event
      7. 3.1.7 Output Hot Short
      8. 3.1.8 Thermal Performance of TPS1685EVM
  9. 4Using the TPS1689EVM-GUI
    1. 4.1 Access the TPS1689EVM-GUI
    2. 4.2 Introduction to the TPS1689EVM-GUI
    3. 4.3 Establishing Communication Between the EVM and GUI
    4. 4.4 Quick Info
    5. 4.5 Configuration
    6. 4.6 Telemetry
    7. 4.7 Register Map Page
  10. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 PCB Drawings
    3. 5.3 Bill OfmAterials (BOM)
  11.   Trademarks
  12. 6Revision History

3.1.8 Thermal Performance of TPS1685EVM

Use the following instructions to evaluate the thermal performance of TPS1685EVM:

  1. Set the input supply voltage VIN to 54V and current limit of 50A.
  2. Connect the power supply between VIN (connector T1) and PGND (connector T3) and enable the power supply.
  3. Now apply a load of 40A (DC) between VOUT (connector T2) and PGND (connector T3) for half an hour or more to reach the thermal equilibrium point.
  4. Capture the thermal image of the EVM or monitor the voltage at TEMP (TP7) pin using a digital multimeter. Voltage at the TEMP (VTEMP) pin reports the maximum die temperature between two eFuses, which can be obtained using Equation 1.
Equation 1. TJ°C=25+VTEMPmV-6702.75 mV/°C

The thermal performance of TPS1685EVM is shown in Figure 3-10.

TPS1689EVM Thermal Performance of TPS1685EVM (VIN = 54V, IOUT = 40A, TA = 30°C, and No External Air Flow)Figure 3-10 Thermal Performance of TPS1685EVM (VIN = 54V, IOUT = 40A, TA = 30°C, and No External Air Flow)